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Diffstat (limited to 'board/apollon/mem.c')
| -rw-r--r-- | board/apollon/mem.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/board/apollon/mem.c b/board/apollon/mem.c new file mode 100644 index 0000000..c0edca5 --- /dev/null +++ b/board/apollon/mem.c @@ -0,0 +1,235 @@ +/* + * (C) Copyright 2005-2007 + * Samsung Electronics, + * Kyungmin Park <kyungmin.park@samsung.com> + * + * Derived from omap2420 + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/arch/omap2420.h> +#include <asm/io.h> +#include <asm/arch/bits.h> +#include <asm/arch/mux.h> +#include <asm/arch/mem.h> +#include <asm/arch/clocks.h> +#include <asm/arch/sys_proto.h> +#include <asm/arch/sys_info.h> + +#include "mem.h" + +/************************************************************ + * sdelay() - simple spin loop. Will be constant time as + * its generally used in 12MHz bypass conditions only. This + * is necessary until timers are accessible. + * + * not inline to increase chances its in cache when called + *************************************************************/ +void sdelay(unsigned long loops) +{ + __asm__("1:\n" "subs %0, %1, #1\n" + "bne 1b":"=r" (loops):"0"(loops)); +} + +/******************************************************************** + * prcm_init() - inits clocks for PRCM as defined in clocks.h + * (config II default). + * -- called from SRAM, or Flash (using temp SRAM stack). + ********************************************************************/ +void prcm_init(void) { } + +/************************************************************************** + * make_cs1_contiguous() - for es2 and above remap cs1 behind cs0 to allow + * command line mem=xyz use all memory with out discontigious support + * compiled in. Could do it at the ATAG, but there really is two banks... + * Called as part of 2nd phase DDR init. + **************************************************************************/ +void make_cs1_contiguous(void) +{ + u32 size, a_add_low, a_add_high; + + size = get_sdr_cs_size(SDRC_CS0_OSET); + size /= SZ_32M; /* find size to offset CS1 */ + a_add_high = (size & 3) << 8; /* set up low field */ + a_add_low = (size & 0x3C) >> 2; /* set up high field */ + __raw_writel((a_add_high | a_add_low), SDRC_CS_CFG); + +} + +/******************************************************** + * mem_ok() - test used to see if timings are correct + * for a part. Helps in gussing which part + * we are currently using. + *******************************************************/ +u32 mem_ok(void) +{ + u32 val1, val2; + u32 pattern = 0x12345678; + + /* clear pos A */ + __raw_writel(0x0, OMAP2420_SDRC_CS0 + 0x400); + /* pattern to pos B */ + __raw_writel(pattern, OMAP2420_SDRC_CS0); + /* remove pattern off the bus */ + __raw_writel(0x0, OMAP2420_SDRC_CS0 + 4); + /* get pos A value */ + val1 = __raw_readl(OMAP2420_SDRC_CS0 + 0x400); + val2 = __raw_readl(OMAP2420_SDRC_CS0); /* get val2 */ + + /* see if pos A value changed */ + if ((val1 != 0) || (val2 != pattern)) + return (0); + else + return (1); +} + +/******************************************************** + * sdrc_init() - init the sdrc chip selects CS0 and CS1 + * - early init routines, called from flash or + * SRAM. + *******************************************************/ +void sdrc_init(void) +{ +#define EARLY_INIT 1 + /* only init up first bank here */ + do_sdrc_init(SDRC_CS0_OSET, EARLY_INIT); +} + +/************************************************************************* + * do_sdrc_init(): initialize the SDRAM for use. + * -called from low level code with stack only. + * -code sets up SDRAM timing and muxing for 2422 or 2420. + * -optimal settings can be placed here, or redone after i2c + * inspection of board info + * + * This is a bit ugly, but should handle all memory moduels + * used with the APOLLON. The first time though this code from s_init() + * we configure the first chip select. Later on we come back and + * will configure the 2nd chip select if it exists. + * + **************************************************************************/ +void do_sdrc_init(u32 offset, u32 early) +{ +} + +/***************************************************** + * gpmc_init(): init gpmc bus + * Init GPMC for x16, MuxMode (SDRAM in x32). + * This code can only be executed from SRAM or SDRAM. + *****************************************************/ +void gpmc_init(void) +{ + u32 mux = 0, mtype, mwidth, rev, tval; + + rev = get_cpu_rev(); + if (rev == CPU_2420_2422_ES1) + tval = 1; + else + tval = 0; /* disable bit switched meaning */ + + /* global settings */ + __raw_writel(0x10, GPMC_SYSCONFIG); /* smart idle */ + __raw_writel(0x0, GPMC_IRQENABLE); /* isr's sources masked */ + __raw_writel(tval, GPMC_TIMEOUT_CONTROL); /* timeout disable */ +#ifdef CFG_NAND_BOOT + /* set nWP, disable limited addr */ + __raw_writel(0x001, GPMC_CONFIG); +#else + /* set nWP, disable limited addr */ + __raw_writel(0x111, GPMC_CONFIG); +#endif + + /* discover bus connection from sysboot */ + if (is_gpmc_muxed() == GPMC_MUXED) + mux = BIT9; + mtype = get_gpmc0_type(); + mwidth = get_gpmc0_width(); + + /* setup cs0 */ + __raw_writel(0x0, GPMC_CONFIG7_0); /* disable current map */ + sdelay(1000); + +#ifdef CFG_NOR_BOOT + __raw_writel(APOLLON_24XX_GPMC_CONFIG1_3, GPMC_CONFIG1_0); + __raw_writel(APOLLON_24XX_GPMC_CONFIG2_3, GPMC_CONFIG2_0); + __raw_writel(APOLLON_24XX_GPMC_CONFIG3_3, GPMC_CONFIG3_0); + __raw_writel(APOLLON_24XX_GPMC_CONFIG4_3, GPMC_CONFIG4_0); + __raw_writel(APOLLON_24XX_GPMC_CONFIG5_3, GPMC_CONFIG5_0); + __raw_writel(APOLLON_24XX_GPMC_CONFIG6_3, GPMC_CONFIG6_0); + __raw_writel(APOLLON_24XX_GPMC_CONFIG7_3, GPMC_CONFIG7_0); +#else + __raw_writel(APOLLON_24XX_GPMC_CONFIG1_0 | mux | mtype | mwidth, + GPMC_CONFIG1_0); + __raw_writel(APOLLON_24XX_GPMC_CONFIG2_0, GPMC_CONFIG2_0); + __raw_writel(APOLLON_24XX_GPMC_CONFIG3_0, GPMC_CONFIG3_0); + __raw_writel(APOLLON_24XX_GPMC_CONFIG4_0, GPMC_CONFIG4_0); + __raw_writel(APOLLON_24XX_GPMC_CONFIG5_0, GPMC_CONFIG5_0); + __raw_writel(APOLLON_24XX_GPMC_CONFIG6_0, GPMC_CONFIG6_0); + __raw_writel(APOLLON_24XX_GPMC_CONFIG7_0, GPMC_CONFIG7_0); +#endif + sdelay(2000); + + /* setup cs1 */ + __raw_writel(0, GPMC_CONFIG7_1); /* disable any mapping */ + sdelay(1000); + + __raw_writel(APOLLON_24XX_GPMC_CONFIG1_1, GPMC_CONFIG1_1); + __raw_writel(APOLLON_24XX_GPMC_CONFIG2_1, GPMC_CONFIG2_1); + __raw_writel(APOLLON_24XX_GPMC_CONFIG3_1, GPMC_CONFIG3_1); + __raw_writel(APOLLON_24XX_GPMC_CONFIG4_1, GPMC_CONFIG4_1); + __raw_writel(APOLLON_24XX_GPMC_CONFIG5_1, GPMC_CONFIG5_1); + __raw_writel(APOLLON_24XX_GPMC_CONFIG6_1, GPMC_CONFIG6_1); + __raw_writel(APOLLON_24XX_GPMC_CONFIG7_1, GPMC_CONFIG7_1); + sdelay(2000); + + /* setup cs2 */ + __raw_writel(APOLLON_24XX_GPMC_CONFIG1_0 | mux | mtype | mwidth, + GPMC_CONFIG1_2); + /* It's same as cs 0 */ + __raw_writel(APOLLON_24XX_GPMC_CONFIG2_0, GPMC_CONFIG2_2); + __raw_writel(APOLLON_24XX_GPMC_CONFIG3_0, GPMC_CONFIG3_2); + __raw_writel(APOLLON_24XX_GPMC_CONFIG4_0, GPMC_CONFIG4_2); + __raw_writel(APOLLON_24XX_GPMC_CONFIG5_0, GPMC_CONFIG5_2); + __raw_writel(APOLLON_24XX_GPMC_CONFIG6_0, GPMC_CONFIG6_2); +#ifdef CFG_NOR_BOOT + __raw_writel(APOLLON_24XX_GPMC_CONFIG7_0, GPMC_CONFIG7_2); +#else + __raw_writel(APOLLON_24XX_GPMC_CONFIG7_2, GPMC_CONFIG7_2); +#endif + +#ifndef CFG_NOR_BOOT + /* setup cs3 */ + __raw_writel(0, GPMC_CONFIG7_3); /* disable any mapping */ + sdelay(1000); + + __raw_writel(APOLLON_24XX_GPMC_CONFIG1_3, GPMC_CONFIG1_3); + __raw_writel(APOLLON_24XX_GPMC_CONFIG2_3, GPMC_CONFIG2_3); + __raw_writel(APOLLON_24XX_GPMC_CONFIG3_3, GPMC_CONFIG3_3); + __raw_writel(APOLLON_24XX_GPMC_CONFIG4_3, GPMC_CONFIG4_3); + __raw_writel(APOLLON_24XX_GPMC_CONFIG5_3, GPMC_CONFIG5_3); + __raw_writel(APOLLON_24XX_GPMC_CONFIG6_3, GPMC_CONFIG6_3); + __raw_writel(APOLLON_24XX_GPMC_CONFIG7_3, GPMC_CONFIG7_3); +#endif + +#ifndef ASYNC_NOR + __raw_writew(0xaa, (APOLLON_CS3_BASE + 0xaaa)); + __raw_writew(0x55, (APOLLON_CS3_BASE + 0x554)); + __raw_writew(0xc0, (APOLLON_CS3_BASE | SYNC_NOR_VALUE)); +#endif + sdelay(2000); +} |